Diffraction Patents (Class 359/558)
  • Patent number: 11448862
    Abstract: A zoom lens L0 includes a first lens unit L1 having a positive refractive power, a second lens unit L2 having a negative refractive power, a third lens unit L3 having a positive refractive power, an intermediate lens group LM including a plurality of lens units, and a last lens unit LR having a negative refractive power. An interval between the adjacent lens units changes during zooming. The zoom lens L0 includes an aperture stop SP. The intermediate lens group LM includes a negative lens unit LN having a negative refractive power. Both the negative lens unit LN and the last lens unit LR move to an object side during zooming from a wide-angle end to a telephoto end. The zoom lens L0 satisfies predetermined conditional inequalities.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: September 20, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Makoto Nakahara, Shunji Iwamoto, Masato Katayose
  • Patent number: 11397079
    Abstract: A rotatable optical module able to aim structured light in different directions includes a driver and an optical assembly positioned at a side of the driver and connected to the driver. The optical assembly projects structured light. The driver drives the optical assembly to rotate, thereby changing the aiming direction of the structured light. An electronic device using such module and placed directly between two target objects is able to function as a meter of the distance between the objects in addition to mapping the contours of each.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: July 26, 2022
    Assignee: TRIPLE WIN TECHNOLOGY(SHENZHEN) CO. LTD.
    Inventors: Shin-Wen Chen, Long-Fei Zhang, Kun Li, Ye-Quang Chen, Xiao-Mei Ma
  • Patent number: 11378725
    Abstract: A method of forming an article which includes a diffraction grating, an article, and an apparatus for forming the article by printing are described. The method includes forming a periodic structure by printing a first set of parallel lines on a first side of a transparent substrate with a marking material and printing a second set of parallel lines on a second side of the transparent substrate with a marking material, the first and second sets of lines, in combination, defining a grating having a frequency and a spacing between lines which causes incident light to be diffracted into a plurality of beams travelling in different directions.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: July 5, 2022
    Assignee: XEROX CORPORATION
    Inventor: Edward N. Chapman
  • Patent number: 11366314
    Abstract: An ocular optical system for imaging of imaging rays entering an eye of an observer via the ocular optical system from a display screen is provided. A side facing towards the eye is an eye-side, and a side facing towards the display screen is a display-side. The ocular optical system includes a first lens element, a second lens element, and a third lens element from the eye-side to the display-side in order along an optical axis. The first lens element, the second lens element, and the third lens element each include an eye-side surface and a display-side surface. Lens elements having refracting power of the ocular optical system are only the first lens element, the second lens element, and the third lens element.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: June 21, 2022
    Assignee: GENIUS ELECTRONIC OPTICAL CO., LTD.
    Inventor: Matthew Bone
  • Patent number: 11358407
    Abstract: A multilayered optical security device has a resonant waveguide grating (RWG) layer on an under layer having a hologram. The RWG layer has plural RWGs for generating one or more patterns. Each RWG has first and second RWG portions, with diffraction gratings of different grating periods, for light coupling-in and coupling-out, respectively. Using the RWGs minimizes interference to a holographic image generated by the under layer. This advantage is especially useful when the holographic image carries digital data such as in digital holographic encryption where an encrypted hologram is used in the under layer. The digital data may contain biometric information such as a fingerprint. In each RWG portion of an individual RWG, scattering elements in a grating are curved to thereby enhance an angular tolerance in azimuthal angle during observing the patterns by an observer while the individual RWG is still selective in elevation angle.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: June 14, 2022
    Assignee: Hong Kong Applied Science and Technology Research Institute Company Limited
    Inventors: Zeineb Ben Aziza, Xiaohan Wang, Ting Hao, Xiuling Zhu, Kenny Chan
  • Patent number: 11305575
    Abstract: Provided are a highly versatile counterfeit-preventive optical element applicable to both the banknote field and the ID field and an information medium including the optical element. A counterfeit-preventive optical element (1) of an embodiment includes a first layer (2), second layer (3), and a third layer (6) that are stacked in this order. A relief structure (R) is provided between the first layer (2) and the second layer (3), the first layer (2) includes a first region (4) and a second region (5), the first region (4) totally reflects incident light incident from the first layer (2) due to at least one of the angle of a face of the relief structure (R) and the refractive index ratio of the first layer (2) and the second layer (3), and the second region (5) transmits or refracts at least some of incident light incident from the first layer (2) due to one of the angle of a face of the relief structure (R) and the refractive index ratio of the first layer (2) and the second layer (3).
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: April 19, 2022
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventor: Kazuhiro Yashiki
  • Patent number: 11275252
    Abstract: A device for forming at least one focused beam in a near-field zone, from an electromagnetic wave incident on the device, is remarkable in that it comprises at least one layer of dielectric material comprising at least partially at least one cavity, the at least one cavity being filled in with a medium having a refractive index lower than that of the dielectric material. The at least one cavity is targeted to be cylindrical or cone-shaped and comprises at least one base surface, defined with respect to an arrival direction of the electromagnetic wave, and at least one lateral surface.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: March 15, 2022
    Assignee: INTERDIGITAL CE PATENT HOLDINGS
    Inventors: Artem Boriskin, Valter Drazic, Laurent Blonde
  • Patent number: 11214650
    Abstract: A composition for a high refractive index, low dispersion resin for a close-contact double layer-type composite diffractive optical element that is highly photocurable and provides a high productivity, and a close-contact double layer-type composite diffractive optical element using such composition are provided. A composition for a high refractive index, low dispersion resin for a close-contact double layer-type composite diffractive optical element includes a thiol compound represented by general formula (1) or an oligomer synthesized by use of a thiol compound represented by general formula (1) (A component); and an ene compound including two or more polymerizable unsaturated bonds (B component). (In the formula, p represents an integer of 2 to 5; Xp and Zp independently represent a hydrogen atom or a mercaptomethyl group; a ratio of sulfur atoms in a molecule is 40 to 80% by mass; and the number of thiol groups is 3 or larger.).
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: January 4, 2022
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Kousuke Namiki, Eiji Koshiishi, Kikuo Furukawa, Hiroshi Horikoshi
  • Patent number: 11209633
    Abstract: An iris image acquisition system for a mobile device, comprises a lens assembly arranged along an optical axis and configured for forming an image comprising at least one iris of a subject disposed frontally to the lens assembly; and an image sensor configured to acquire the formed image. The lens assembly comprises a first lens refractive element and at least one second lens element for converging incident radiation to the first refractive element. The first refractive element has a variable thickness configured to counteract a shift of the formed image along the optical axis induced by change in iris-lens assembly distance, such that different areas of the image sensor on which irises at different respective iris-lens assembly distances are formed are in focus within a range of respective iris-lens assembly distances at which iris detail is provided at sufficient contrast to be recognised.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: December 28, 2021
    Assignee: FotoNation Limited
    Inventors: Niamh Fitzgerald, Christopher Dainty, Alexander Goncharov
  • Patent number: 11187897
    Abstract: A head-up display for a vehicle includes: a display panel, a deflector having a plurality of microlenses, and an image generator. The image generator is configured to generate a plurality of primary elementary images which are multiplied by an optical multiplier into elementary images, which are in turn assigned in each case to a respective one of the plurality of microlenses.
    Type: Grant
    Filed: November 23, 2017
    Date of Patent: November 30, 2021
    Assignee: Continental Automotive GmbH
    Inventors: Wolff von Spiegel, Rudolf Mitsch, Daniel Krüger, Ulf Stabenow, Dirk Brömme-Jártimová
  • Patent number: 11175439
    Abstract: A transmission structure includes a plurality of first transmission units and a plurality of second transmission units. A transmission phase of an electromagnetic wave of the second transmission unit is equal or similar to a transmission phase of an electromagnetic wave of the first transmission unit. A reflection phase of the electromagnetic wave of the second transmission unit is different from a reflection phase of the electromagnetic wave of the first transmission unit. The plurality of first transmission units and the plurality of second transmission units are arranged disorderly on a surface.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: November 16, 2021
    Assignee: NANJING STAR HIDDEN TECHNOLOGY DEVELOPMENT CO., LTD.
    Inventors: Yun Lai, Hongchen Chu
  • Patent number: 11175562
    Abstract: An integrated optical beam steering device includes a planar dielectric lens that collimates beams from different inputs in different directions within the lens plane. It also includes an output coupler, such as a grating or photonic crystal, that guides the collimated beams in different directions out of the lens plane. A switch matrix controls which input port is illuminated and hence the in-plane propagation direction of the collimated beam. And a tunable light source changes the wavelength to control the angle at which the collimated beam leaves the plane of the substrate. The device is very efficient, in part because the input port (and thus in-plane propagation direction) can be changed by actuating only log2 N of the N switches in the switch matrix. It can also be much simpler, smaller, and cheaper because it needs fewer control lines than a conventional optical phased array with the same resolution.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: November 16, 2021
    Assignee: Massachusetts Institute of Technology
    Inventors: Scott A. Skirlo, Cheryl Marie Sorace-Agaskar, Marin Soljacic, Simon Verghese, Jeffrey S. Herd, Paul William Juodawlkis, Yi Yang, Dirk Englund, Mihika Prabhu
  • Patent number: 11150483
    Abstract: A diffractive optical beam shaping element for imposing a phase distribution on a laser beam that is intended for laser processing of a material includes a phase mask that is shaped as an area and is configured for imposing a plurality of beam shaping phase distributions on the laser beam incident on to the phase mask. A virtual optical image is attributed to at least one of the plurality of beam shaping phase distributions, wherein the virtual image can be imaged into an elongated focus zone for creating a modification in the material to be processed. Multiple such elongated focus zones can spatially add up and interfere with each other, to modify an intensity distribution in the material and, for example, generate an asymmetric modification zone.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: October 19, 2021
    Assignee: TRUMPF Laser- und Systemtechnik GmbH
    Inventors: Malte Kumkar, Daniel Grossmann, Daniel Flamm
  • Patent number: 11131858
    Abstract: A low-height projector assembly includes a biconvex lens, a converging lens, an aperture stop, and a beam-steerer between the biconvex lens and the converging lens. The biconvex lens has a principal plane, a focal length, and a first optical axis. The converging lens has a second optical axis laterally offset from the first. The beam-steerer is configured to steer light from the biconvex lens to the converging lens. An aperture-stop plane intersects the second optical axis and the aperture stop. On the second optical axis, at least one of a front surface and a back surface of the converging lens is between the aperture-stop plane and the beam-steerer. The axial chief ray's propagation distance from the principal plane to the aperture stop differs from the focal length by less than half the depth of focus of the biconvex lens.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: September 28, 2021
    Assignee: OmniVision Technologies, Inc.
    Inventors: Tingyu Cheng, Jau-Jan Deng
  • Patent number: 11134272
    Abstract: Techniques are described in which a decoder is configured to receive an input data block and apply an inverse non-separable transform to at least part of the input data block to generate an inverse non-separable transform output coefficient block. The applying the inverse non-separable transform comprises assigning a window, assigning a weight for each position inside the assigned window, and determining the inverse non-separable transform output coefficient block based on the assigned weights. The decoder is further configured to forming a decoded video block based on the determined inverse non-separable transform output coefficient block, wherein forming the decoded video block comprises summing the residual video block with one or more predictive blocks.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: September 28, 2021
    Assignee: Qualcomm Incorporated
    Inventors: Xin Zhao, Vadim Seregin, Amir Said, Marta Karczewicz
  • Patent number: 11086065
    Abstract: The invention relates to a diffractive optical grating and applications thereof. The grating comprises a first zone and a second zone each having a two-dimensionally periodic grating structure having a first period (dx) in a first direction, the first period being chosen to allow for diffraction of selected wavelengths of visible light along the first direction, and a second period (dy) in a second direction different from the first direction, the second period (dy) being short enough to prevent diffraction of said selected wavelengths along the second direction. According to the invention, the grating structures in the first zone and in the second zone have different modulation characteristics in said second direction for producing different diffraction efficiencies for the first and second zones. The invention provides a new design parameter, sub-wavelength modulation, for assisting in local adjustment of diffraction efficiency of gratings in particular in display applications.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: August 10, 2021
    Assignee: Dispelix Oy
    Inventors: Ismo Vartiainen, Juuso Olkkonen, Jussi Rahomäki
  • Patent number: 11048090
    Abstract: A waveguide display includes light sources, a source waveguide, an output waveguide, and a controller. Light from each of the light sources is coupled into the source waveguide. The source waveguide includes gratings with a constant period determined based on the conditions for total internal reflection and first order diffraction of the received image light. The emitted image light is coupled into the output waveguide at several entrance locations. The output waveguide outputs expanded image lights at a location offset from the entrance location, and the location/direction of the emitted expanded image light is based in part on the orientation of the light sources. Each of the expanded image light is associated with a field of view of the expanded image light emitted by the output waveguide.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: June 29, 2021
    Assignee: Facebook Technologies, LLC
    Inventor: Pasi Saarikko
  • Patent number: 10989925
    Abstract: A light flux diameter expanding element includes a light guiding plate with a light input face and a light output face, and with a thickness of 0.2 mm to 0.8 mm; a diffraction grating on the input side; and a diffraction grating on the output side, and is provided so as to have the same grating period as that of the diffraction grating on the input side, in which a forming region of the diffraction grating on the input side is smaller than that of the output side, and a grating period of the diffraction grating on the input side is a period in which a small diffraction angle in diffraction angles of +1-st order diffracted light and ?1-st order diffracted light, which are diffracted in the diffraction grating on the input side, in the light guiding plate becomes larger than a critical angle of the light guiding plate.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: April 27, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Osamu Yokoyama
  • Patent number: 10948698
    Abstract: A lens assembly includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens are arranged in order from an object side to an image side along an optical axis. The first lens has negative refractive power. The second lens has positive refractive power. The third lens has negative refractive power and includes a convex surface facing the image side. The fourth lens has positive refractive power and includes a concave surface facing the object side. The fifth lens has positive refractive power and includes a concave surface facing the image side.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: March 16, 2021
    Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., ASIA OPTICAL CO., INC.
    Inventors: Ming-Huang Tseng, Hsi-Ling Chang
  • Patent number: 10867407
    Abstract: Multiple cameras are coupled to a camera rig. Multiple diffractive optical elements (DOEs) are coupled to a DOE prop. Each camera is positioned in an eye box of a DOE and takes an image when the cameras are positioned at a first position, a second position and a third position relative to the DOEs. Three images taken by a each camera at each one of the first position, the second position and third position. The images are transmitted to a processor coupled to the camera rig. For each image, the processor identifies data pairs, each data pair including pixel coordinates of an intensity peak in the image and virtual light source produced by the diffractive optical element that corresponds to the intensity peak, and determines extrinsic parameters of the cameras using the identified data pairs for each image.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: December 15, 2020
    Assignee: Magic Leap, Inc.
    Inventors: Zhiheng Jia, Etienne Gregoire Grossmann, Hao Zheng
  • Patent number: 10852460
    Abstract: There is provided a diffraction optical element which comprises a base material, and in which a first resin layer having a diffraction grating shape and a second resin layer are laminated on the base material. The diffraction grating shape forms a plurality of concentric annular sections when planarly viewed from a lamination direction of the diffraction optical element. The second resin layer comprises a first portion and a second portion, and the first portion is provided on a first annular section of the first resin layer. The second portion is continuously provided from above the first portion to above a region including a periphery of the first resin layer. A difference between a refractive index of the second portion on a center of the first annular section and a refractive index of the second portion on a circumference of the first annular section is within 0.0005.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: December 1, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kenichi Iwata
  • Patent number: 10837765
    Abstract: Apparatus for structured light scanning. The structured light includes one or more projected lines or other patterns. At least two independent emitters emit light for each projected line or pattern. Typically the at least two independent emitters are arranged in a row. The apparatus also includes a pattern generator for causing light from respective emitters of a given row to overlap along a pattern axis to form a projected pattern.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: November 17, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Guy Raz, Nadav Grossinger, Nitay Romano
  • Patent number: 10832429
    Abstract: A device and method for obtaining depth information from a light field is provided. The method generating a plurality of epipolar images from a light field captured by a light field acquisition device; an edge detection step for detecting, in the epipolar images, edges of objects in the scene captured by the light field acquisition device; for each epipolar image, detecting valid epipolar lines formed by a set of edges; and determining the slopes of the valid epipolar lines. In a preferred embodiment, the method extend the epipolar images with additional information of images captured by additional image acquisition devices and obtain extended epipolar lines. The edge detection step calculates a second spatial derivative for each pixel of the epipolar images and detects the zero-crossings of the second spatial derivatives.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: November 10, 2020
    Assignee: PHOTONIC SENSORS & ALGORITHMS, S.L.
    Inventors: Jorge Vicente Blasco Claret, Carles Montoliu Alvaro, Arnau Calatayud Calatayud, Leticia Carrion, Adolfo Martinez Uso
  • Patent number: 10795160
    Abstract: A near eye optical display includes a waveguide comprising a first surface and a second surface, an input coupler, a fold grating, and an output grating. The input coupler is configured to receive collimated light from a display source and to cause the light to travel within the waveguide via total internal reflection between the first surface and the second surface to the fold grating; the fold grating is configured to provide pupil expansion in a first direction and to direct the light to the output grating via total internal reflection between the first surface and the second surface; and the output grating is configured to provide pupil expansion in a second direction different than the first direction and to cause the light to exit the waveguide from the first surface or the second surface.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: October 6, 2020
    Assignees: Rockwell Collins, Inc., Digilens Inc.
    Inventors: James H. Stanley, Jonathan David Waldern, Milan Momcilo Popovich, Alastair John Grant, Steven J. Robbins
  • Patent number: 10777780
    Abstract: A battery or an accumulator including an anode case, an anode situated inside the anode case, a cathode case joined to the anode case, a seal sealing the cathode case to the anode case, a cathode situated inside the cathode case between the anode and the cathode case, and a membrane between the anode and the cathode. An outer surface of the battery includes at least one marking.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: September 15, 2020
    Assignee: THE SWATCH GROUP RESEARCH AND DEVELOPMENT LTD
    Inventors: Yves Burri, Michael Stalder, Jean-Claude Martin
  • Patent number: 10761320
    Abstract: An optical stack including a periodically varying optical film layer and a grating assembly for reducing moiré is described. The grating assembly includes first and second layers where an interface between the first and second layers define a grating having a peak to valley height and an index contrast. The index contrast multiplied by the peak to valley height may be between 150 nm and 350 nm and the grating has a pitch in the range of 2 micrometers to 50 micrometers. Each of the first and second layers may be viscoelastic or elastomeric adhesive layers, crosslinked resin layers, or soluble resin layers.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: September 1, 2020
    Assignee: 3M Innovative Properties Company
    Inventors: Brett J. Sitter, Matthew M. Philippi, Mary M. Pichotta, Chi Zhang, Daniel W. Hennen, Gary T. Boyd, Michael E. Lauters
  • Patent number: 10746907
    Abstract: The present disclosure relates to semiconductor structures and, more particularly, to grating couplers with structured cladding and methods of manufacture. A structure includes: a grating coupler in a dielectric material; a back end of line (BEOL) multilayer stack over the dielectric material; and a multi-layered cladding structure of alternating materials directly on the BEOL multilayer stack.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: August 18, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Ajey Poovannummoottil Jacob, Yusheng Bian
  • Patent number: 10739558
    Abstract: The present invention provides a camera optical lens, comprising a lens group having a plurality of lens units and an aperture stop; wherein one of the lens units is provided with a coding surface having a wavefront coding surface near the aperture stop. Due to the wavefront coding surface, the aspherical surface can modulate the distribution of optical path of the camera optical lens.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: August 11, 2020
    Assignee: AAC Optics Solutions Pte. Ltd.
    Inventors: Xiaonan Zhao, Rongbao Shi
  • Patent number: 10718932
    Abstract: An optical system comprising trapping optics for forming an optical trap using counter propagating beams of light and light sheet imaging optics for light sheet imaging a particle, for example a cell, that is positioned in the optical trap, wherein the wavelength of the counter propagating beams of light and the wavelength of the light used for light sheet imaging are non-interfering.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: July 21, 2020
    Assignee: UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS
    Inventors: Zhengyi Yang, Kishan Dholakia
  • Patent number: 10705314
    Abstract: A collimator lens system includes a first lens, a second lens, a third lens and a diaphragm from an object side to an image side of the system in turn along an optical axis, in which the first lens is of a positive focal power, and an object side surface thereof is convex; the second lens is of a negative focal power; the third lens is of a positive focal power, and an image side surface thereof is convex; optical centers of all the lenses are arranged along a same straight line, the system meets following formulas: f12>f3; (dn/dt)1<?50×10?6/° C.; (dn/dt)2<?50×10?6/° C.; (dn/dt)3>?10×10?6/° C., where f12 represents a combined focal length of the first and second lenses, f3 represents a focal length of the third lens, and (dn/dt)1, (dn/dt)2, and (dn/dt)3 represent change rates of refractive indices of the first lens, the second lens and the third lens with temperature, respectively.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: July 7, 2020
    Assignee: JIANGXI LIANCHUANG ELECTRONIC CO., LTD.
    Inventors: Xuming Liu, Kemin Wang, Jiyong Zeng, Haojie Zeng, Yumin Bao, Weijian Chen
  • Patent number: 10684450
    Abstract: An annular optical element includes a first side surface, a second side surface, an outer annular surface and an inner annular surface. The outer annular surface connects the first side surface and the second side surface, and surrounds a central axis of the annular optical element. The inner annular surface connects the first side surface and the second side surface, surrounds the central axis, and is closer to the central axis than the outer annular surface is to the central axis. The inner annular surface includes a plurality of protrusion circles surrounding the central axis and arranged along a direction from the first side surface towards the second side surface. Each of the protrusion circles includes a plurality of protrusion structures and a plurality of separation structures, and the protrusion structures and the separation structures are alternately arranged to surround the central axis.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: June 16, 2020
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Jung-Lieh Tsai, Ming-Ta Chou
  • Patent number: 10677969
    Abstract: Disclosed is an improved diffraction structure for 3D display systems. The improved diffraction structure includes an intermediate layer that resides between a waveguide substrate and a top grating surface. The top grating surface comprises a first material that corresponds to a first refractive index value, the underlayer comprises a second material that corresponds to a second refractive index value, and the substrate comprises a third material that corresponds to a third refractive index value. According to additional embodiments, improved approaches are provided to implement deposition of imprint materials onto a substrate, which allow for very precise distribution and deposition of different imprint patterns onto any number of substrate surfaces.
    Type: Grant
    Filed: March 5, 2016
    Date of Patent: June 9, 2020
    Assignee: Magic Leap, Inc.
    Inventors: Robert D. Tekolste, Michael A. Klug, Paul M. Greco, Brian T. Schowengerdt
  • Patent number: 10649221
    Abstract: An optical processing apparatus includes a light source, a condensing lens, and a light shield. The light source emits a light. The condensing lens converts a light emitted from the light source into a Bessel beam and condenses the light onto a surface of an object. The light shield shields an outer edge portion of the light in a cross section of a direction orthogonal to the optical axis of the light. The light shield may shield the outer edge portion of the light after entering the condensing lens and before condensing onto the surface of the object in the cross section of the direction orthogonal to the optical axis of the light.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: May 12, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventor: Asato Tamura
  • Patent number: 10646105
    Abstract: The present invention is directed to an achromatic endoscope which employs a diffractive microlens. Along with a broadband rotary joint and a custom 800 nm SD-OCT system, ultrahigh-resolution 3D volumetric imaging over a large area becomes possible. The diffractive microlens can be used directly with a GRIN lens, making the endoscope design simpler and cost effective. Preliminary ex vivo 3D intraluminal imaging was performed with the endoscope in conjunction with a home-built broadband rotary joint and a spectral-domain OCT system, demonstrating the performance of the diffractive endoscope. Considering the miniature OCT imaging probe is the required component for using the OCT technology in internal organs, the proposed approach will have a broad impact on endoscopic OCT imaging by improving OCT resolution in any applications that involve a miniature OCT probe, as intravascular OCT imaging, gastrointestinal (GI) tract imaging, airway imaging etc.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: May 12, 2020
    Assignee: The Johns Hopkins University
    Inventors: Xingde Li, Anqi Zhang, Jiefeng Xi
  • Patent number: 10634919
    Abstract: Systems, devices, and methods for optical waveguides that are well-suited for use in wearable heads-up displays (WHUDs) are described. An optical device comprises an optical waveguide including a volume of optically transparent material having a first longitudinal surface positioned opposite a second longitudinal surface across a width of the volume, an in-coupler, a liquid crystal out-coupler, and a controller to modulate a refractive index of the liquid crystal out-coupler. Light is in-coupled into the waveguide and is propagated along a length of the waveguide by total internal reflection between the longitudinal surfaces before being out-coupled by the liquid crystal out-coupler on a path that is dependent on the modulated refractive index of the liquid crystal out-coupler. In this way, light signals can be steered to create an image and/or to move an exit pupil of an image. WHUDs that employ such optical waveguides are also described.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: April 28, 2020
    Assignee: North Inc.
    Inventors: Stefan Alexander, Douglas Raymond Dykaar, John Otto Vieth, Timothy Paul Bodiya
  • Patent number: 10545335
    Abstract: Provided is an optical system comprising a cemented lens including a positive lens, a negative lens, and an optical element cemented to the positive lens and the negative lens in which the optical element is made of an ultraviolet curing resin. An internal transmittance at a wavelength of an ultraviolet ray at which the ultraviolet curing resin is cured per thickness of 10 mm of a material for a first lens which is arranged on an object side out of the positive lens and the negative lens, and a minimum value and a maximum value of a thickness of the first lens in an optical axis direction are appropriately set.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: January 28, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kenta Sudo
  • Patent number: 10429652
    Abstract: A waveguide display includes light sources, a source waveguide, an output waveguide, and a controller. Light from each of the light sources is coupled into the source waveguide. The source waveguide includes gratings with a constant period determined based on the conditions for total internal reflection and first order diffraction of the received image light. The emitted image light is coupled into the output waveguide at several entrance locations. The output waveguide outputs expanded image lights at a location offset from the entrance location, and the location/direction of the emitted expanded image light is based in part on the orientation of the light sources. Each of the expanded image light is associated with a field of view of the expanded image light emitted by the output waveguide.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: October 1, 2019
    Assignee: Facebook Technologies, LLC
    Inventor: Pasi Saarikko
  • Patent number: 10401632
    Abstract: A planar line generator including a first planar surface extending in a first direction, a second planar surface facing the first planar surface, and a beam splitter in front of the second planar surface, the beam splitter configured to output, from light incident thereon, an undeflected beam, a first beam deflected to a first side of the undeflected beam along the first direction, and a second beam deflected to a second side of the undeflected beam along the first direction, wherein the second planar surface includes a line diffuser configured to receive the undeflected beam, and first and second diffusers having a design different from the line diffuser, the first and second diffusers being configured to receive the first and second beams, respectively.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: September 3, 2019
    Assignee: FLIR SYSTEMS, INC.
    Inventors: Robert Hutchins, Alan D. Kathman
  • Patent number: 10356390
    Abstract: The three-dimensional microscopic imaging system includes: a microscope; a field diaphragm; a narrow-band filter, configured to perform narrow-band filtering; a beam-splitting grating, configured to duplicate a beam into beams with different angles; a lens array with different focal length, configured to perform different phase modulation to each beam with different angles; a micro lens array, configured to modulate the beams with different angles that pass through the lens array with different focal length respectively to different spatial locations at a back focal plane of the micro lens array respectively; and an image sensor configured to record an image corresponding to the modulated beams at the back focal plane of the micro lens array. The system has a simple structure, a cheap cost, and a relatively weak exciting light, and is suit for living samples, and has the adjustable intervals of imaging depths.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: July 16, 2019
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Qionghai Dai, Jijun He, Jiamin Wu
  • Patent number: 10281725
    Abstract: A light flux diameter expanding element includes a light guiding plate with a light input face and a light output face, and with a thickness of 0.2 mm to 0.8 mm; a diffraction grating on the input side; and a diffraction grating on the output side, and is provided so as to have the same grating period as that of the diffraction grating on the input side, in which a forming region of the diffraction grating on the input side is smaller than that of the output side, and a grating period of the diffraction grating on the input side is a period in which a small diffraction angle in diffraction angles of +1-st order diffracted light and ?1-st order diffracted light, which are diffracted in the diffraction grating on the input side, in the light guiding plate becomes larger than a critical angle of the light guiding plate.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: May 7, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Osamu Yokoyama
  • Patent number: 10259178
    Abstract: Method for producing a lens array, which can prevent a weld from being formed in the peripheral part of a lens part and suppress increase of a work time of a transfer mold, and a molding mold. Since a master mold 10 of a molding mold has a plurality of linear groove parts 14e surrounding a plurality of cavity parts 12, resin hardly spreads to a corner part 14p where the adjacent linear groove parts 14e and 14e intersect each other and it is possible to prevent portions of the resin which have run over toward the adjacent groove parts 14e and 14e from spreading so as to come close to each other and being brought into contact with each other to create a weld trapping air bubbles.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: April 16, 2019
    Assignee: Konica Minolta, Inc.
    Inventors: Toshiyuki Imai, Daisuke Watanabe, Akira Sato
  • Patent number: 10234695
    Abstract: A method for producing an optical apparatus includes providing a pair of glass wafers. One or more diffractive optical elements (DOEs) are formed on one or more of the glass wafers. A spacer is positioned between the glass wafers so as to define a cavity containing the DOEs, and a hermetic seal that bonds the glass wafers together and seals the cavity is formed.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: March 19, 2019
    Assignee: APPLE INC.
    Inventors: Moshe Kriman, Adar Magen
  • Patent number: 10185065
    Abstract: An optically variable device and method of manufacturing the device is disclosed, the device including a plurality of zero-order diffraction grating elements some of which are modulated such that a coloured at least partially polarized image is visible to a person viewing the device, observing a first optically variable effect when the device is rotated about an axis substantially perpendicular to the plane, and a second optically variable effect when the device is viewed under polarized light and rotated about an axis substantially perpendicular to or parallel with the plane. The device is particularly suitable for security documents such as bank notes. Preferably, the first optically variable effect is produced by a change in brightness and/or color of the grating elements and the second optically variable effect may likewise be produced by a change in brightness and/or color of the grating elements.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: January 22, 2019
    Assignee: CLL Secure Pty Ltd
    Inventors: Phei Lok, Robert Arthur Lee
  • Patent number: 10182275
    Abstract: Disclosed herein is wavelength-division multiplexer with an internal optical signal tuned by a mounted signal pitch router. In particular, disclosed is a wavelength-division multiplexing (WDM) optical assembly including an optical signal router, a WDM filter, and a signal pitch router. The WDM filter has a wavelength selective surface positioned proximate the second side of the optical signal router. The signal pitch router has a transmissive surface positioned proximate to a side of the optical signal router, and a second reflective surface opposite the transmissive surface. A depth of the signal pitch router establishes and tunes a pitch of a routing optical path within the optical signal router. This provides for easier, faster, more reliable, and more cost effective manufacturing and assembly of the WDM optical assembly.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: January 15, 2019
    Assignee: Alliance Fiber Optic Products, Inc.
    Inventors: Qijun Xiao, Andy Fenglei Zhou
  • Patent number: 10175392
    Abstract: An optical processor is presented for applying optical processing to a light field passing through a predetermined imaging lens unit. The optical processor comprises a pattern in the form of spaced apart regions of different optical properties. The pattern is configured to define a phase coder, and a dispersion profile coder. The phase coder affects profiles of Through Focus Modulation Transfer Function (TFMTF) for different wavelength components of the light field in accordance with a predetermined profile of an extended depth of focusing to be obtained by the imaging lens unit. The dispersion profile coder is configured in accordance with the imaging lens unit and the predetermined profile of the extended depth of focusing to provide a predetermined overlapping between said TFMTF profiles within said predetermined profile of the extended depth of focusing.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: January 8, 2019
    Assignee: Brien Holden Vision Institute
    Inventors: Zeev Zalevsky, Alex Zlotnik, Ido Raveh, Shai Ben-Yaish, Ofer Limon, Oren Yehezkel, Karen Lahav
  • Patent number: 10156778
    Abstract: A display device includes an image projection device, a light guide plate, and a mask. The light guide plate includes deflectors arranged in a propagation direction of a light beam emitted from the image projection device and entering the light guide plate. Each deflector causes light beams to be emitted from an outgoing surface at angles different from each other in the propagation direction, the light beams emitted from locations different from each other or emitted in directions different from each other in a direction orthogonal to the longer direction of an incident surface in a displayed region of the image projection device. The mask shuts-off light beams other than a light beam directed toward a predetermined viewpoint among light beams emitted from the outgoing surface. The image projection device collimates light beams emitted from the region, in the direction orthogonal to the longer direction of the incident surface.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: December 18, 2018
    Assignee: OMRON Corporation
    Inventor: Masayuki Shinohara
  • Patent number: 10135076
    Abstract: A body-mountable device includes an electrochemical battery configured to provide power when exposed to an aqueous fluid. The aqueous fluid could be blood, sweat, tears, or some other bodily fluid. The electrochemical battery includes an anode that includes zinc metal and is configured to provide an electrical potential relative to a cathode when the anode and cathode are exposed to oxygen and an aqueous fluid. The electrochemical battery could provide power to electronics configured to measure a physiological parameter at a plurality of points in time, to record such measured parameters, to transmit such measured parameters to an external system, or to perform some other functions. Components of the body-mountable device could be embedded in a polymeric material configured for mounting to a surface of an eye. Components of the body-mountable device could be disposed on a flexible substrate configured for mounting to a skin surface.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: November 20, 2018
    Assignee: Verily Life Sciences LLC
    Inventor: Zenghe Liu
  • Patent number: 10088633
    Abstract: An optical waveguide is provided having at least first and second diffraction regions, the first diffraction region being arranged to diffract image-bearing light propagating along the waveguide so as to expand it in a first dimension and to turn the image-bearing light towards the second diffraction region, the second diffraction region being arranged to diffract the image-bearing light so as to expand it in a second dimension and to release it from the waveguide as a visible image. The first diffraction region is formed by first diffraction grating embedded within the waveguide, arranged to present a substantially similar profile to the image-bearing light when incident upon the grating from a given angle above or below the grating such that the polarization of the image bearing light is rotated by substantially similar amounts, but in opposite directions, by successive interactions with the first diffraction region.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: October 2, 2018
    Assignee: BAE SYSTEMS, plc
    Inventor: Stephen Paul Mason
  • Patent number: 10082684
    Abstract: A high contrast grating optical modulation includes an optical modulator at a front surface of a substrate to modulate received light. The high contrast grating optical modulation further includes a high contrast grating (HCG) lens adjacent to a back surface of the substrate opposite to the front surface to focus incident light onto the optical modulator. The substrate is transparent to operational wavelengths of the focused incident light and the modulated light.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: September 25, 2018
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Sagi Varghese Mathai, David A. Fattal, Michael Renne Ty Tan, Wayne Victor Sorin
  • Patent number: 9924144
    Abstract: The invention provides a light field illuminating method, device and system. The method includes: determining, based on position and angle of rays emitted from a projector and focal length of a lens, position and angle of projection rays obtained after the emitted rays being transmitted through a lens array; determining, based on position and angle of projection rays and light probe array of sampled scene, brightness value of projection rays; converting, based on brightness transfer function of projector, brightness value of projection rays into pixel value of projection input image, generating projection input image based on pixel value of projected input image; and performing light field illumination on target object with projection input image. A projector and a lens array are adopted to achieve light field illumination, so that pixel-level accurate lighting control can be achieved, and various complicated light field environments can be simulated vividly in practical scenario.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: March 20, 2018
    Assignee: BEIHANG UNIVERSITY
    Inventors: Qinping Zhao, Zhong Zhou, Tao Yu, Chang Xing